喷射电沉积镍阴极极化行为研究  

JET ELECTRODEPOSIT CATHODIC POLARIZATION ACTION

作　　者：韩东生[1] 荆天辅[1] 乔桂英[1] 周继锋[1] 李季辉[2] 

机构地区：[1]燕山大学亚稳材料制备技术与科学重点实验室,秦皇岛066004 [2]燕山大学信息科学与工程学院,秦皇岛066004

出　　处：《中国腐蚀与防护学报》2005年第1期30-33,共4页Journal of Chinese Society For Corrosion and Protection

基　　金：河北省自然科学基金项目 (5 982 5 0 )

摘　　要：通过阴极极化曲线的测定研究了硫酸盐电解液喷射速度u(流速 )对电流密度jc 和阴极过电位 ηc 的影响 .结果表明 ,电流密度为 14 0A/dm2 时 ,喷射速度由 0 .83m/s增大到 5 .0 0m/s,阴极过电位从 1.4 8V增至 8.5 2V .与槽镀搅拌作用相比 ,电解液流速增大 ,有利于氢还原析出 ,导致过电位显著增大 .随电流密度增大 ,阴极上析氢步骤逐渐取代水合镍离子电化学还原步骤成为整个过程的控制步骤 ,过电位可达 12 .0 3V .The relationship between jet flow rate,current density and cathodic overpotential was studied by measuring cathodic polarization curve in simple sulfate system.The results show that when jet flow rate increases from 0.83m/s to 5.00 m/s,overpotential increases from 1.48 V to 8.52 V (current density is 140 A/dm2).Compared with stir of traditional plating,cathodic overpotential increased obviously with jet flow rate increasing because of hydrogen deoxidization.Control steps change from Ni 2+·mH_2O electrochemistry deoxidization to hydrogen deoxidization on cathodic surface with increase of current density.Overpotential can reach 12.03 V.

关 键 词：喷射电沉积 镍 过电位 控制步骤 

分 类 号：TG174.4[金属学及工艺—金属表面处理]